Snatch-block.



No. 776,558. PATENTBD DEC. 6, 1904. J. B. SJOBERG.

SNATGH BLOCK.

APPLICATION FILED JAN. 27, 1904.

N0 MODEL.

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I :5 Q I l mmoai llnirnn Srnrns Patented December 6, 1904.

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SWATCH-BLOCK.

SPECIFICATION forming part of Letters Patent N 0. 776,558, datedDecember 6, 1904. Application filed January 27, 1904. Serial No.190,794- (No model.)

'1'!) all whom it may concern:

Be it known that I, JonN E. SJoBnRe, a citi- Zen of the United States ofAmerica, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inSnatch- Blocks, of which the following is a specification.

This invention relates to hoisting-machinery, and particularly to aclass thereunder known as snatch-blocks.

An object of this invention is to provide a detachable hook and blockfor permitting the ready insertion of the rope or other flexibleconnection to the pulley of the block.

Furthermore, an object of the invention is to provide a block of thischaracter in which the pull or strain on the flexible connections is indirect line with the hook, which is attached to the block, thus insuringthe true running of the flexible connection of the pulley and obviatingany such movement of the said flexible connection which might result inits binding against either side of the block.

Furthermore, an object of the invention is to provide a block of thecharacter in which the said block is balanced on the hook in a manner tocause the said block to hang perfectly true with relation to the saidhook.

Furthermore, an object of the invention is to provide a hook and blockand means for readily engaging or disengaging the hooksupporting meansand the block through the medium of a cotter-pin which has suificientspring action to prevent accidental disengagement of the said cotter-pinwith the interlocking parts of the hook and block.

Finally, an object of the invention is to produce a snatch-block of thecharacter noted which will possess advantages in points of simplicity,efliciency, and durability, proving at the same time comparativelyinexpensive to manufacture.

With the foregoing and other objects in view the invention consists inthe details of construction and in the arrangement and combination ofparts to be hereinafter more fully set forth and specifically claimed.

In describing the invention in detail reference will be had to theaccompanying drawings, forming part of this specification, wherein likecharacters denote corresponding parts throughout the several views, inwhich- Figure 1 is a side view in elevation showing a block and hookembodying the invention. Fig. 2 illustrates an elevation of the edge ofthe block and in dotted lines showing the hook thrown over to permit theapplication of the flexible connection to the pulley. Fig. 3 is a Viewsimilar to Fig. 2 except that a double block is illustrated.

In the drawings, (t denotes the body of the block, having a shaft 6, onwhich the pulley c is mounted.

The sides of the block a are provided with reinforcing-bolts (Z,extending from one edge to the other and secured in any suitable manner.

The attachment for the hook 6 comprises metallic straps f, bent onthemselves to form eyes which receive the shaft 6, the body portion ofthe sections of the straps lying parallel and havingtheir ends divergingsomewhat for the reception of the cross-bar 17L, through which the hooka is swiveled. The cross-bar 71. is pivoted, by means of the pin A,between the ends of the straps on one side of the block and is securedat the other end between the ends of the strap through the medium of acotter-pin B, which cotter-pin may be removed and inserted at the willof the operator. The block is provided with slots (1 in which the strapsare seated. The edges of the block below the pulley are cut away, as at2', for the purpose of permitting the flexible connection to run overthe said pulley without contacting with the block at this point.

In Fig. 3 approximately the same construction is illustrated as thatshown in Figs. 1 and 2, with the exception that the straps f aremultiplied and the bar it is pivoted at the point C and has cotter-pinsD at two points extending through the said bar 72 for the purpose ofconnecting the said bar to the said straps f. In this last-mentionedconstruction a yoke j has its ends anchored in the cross-bar it, and thehook a is swiveled in the yoke The shaft 1/ and the pulleys c in thisconstruction are the same as that shown in Figs. 1 and 2. except that inthis form the shaft 6 is slightly longer than in the other device. andthe flexible connections,

'which run over these pulleys, Wlll act in a direct line with theattachment of the yoke i of the bar it, thus preventing any sidewisehang of said block.

The construction, operation, and advantages will, it is thought, beunderstood from the foregoing description, it being noted that va riouschanges may be resorted to in the proportions and details ofconstruction for successfully carrying the invention into practicewithout departing from its scope.

Having fully described the invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a block of the character described, a body, a shaft adapted tosupport pulleys, straps having loops embracing the shaft, the free endsof said straps extending above the body of the block, a bar securedbetween the ends of the straps and a hook connected to the bar.

2. In a block of the character described, a body, a shaft thereimapulley mounted on the shaft, straps doubled on themselves and having thelooped portion embracing the shaft, the free ends of said strapsextending above the body of the block and being separated, a bar pivotedbetween the ends of one strap, means for connecting the bar to the endsof the opposite strap and a hook for supporting the bar.

In testimony whereof I aflix my signature, in the presence of twowitnesses, this 20th day of January," 1904. 7

JOHN E. SJOBER-G. Witnesses:

ROBERT PETERSON, PoN'rUs. E. CARLsoN.

